package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.constant.WXConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @Description UserServiceImpl
 * @Author liuqiang
 * @Date 2024/2/23
 */
@Slf4j
@Service
public class UserServiceImpl implements UserService {

    @Value("${sky.wechat.wx-get-url}")
    private String wxGetUrl;

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user = userMapper.getUserByOpenid(openid);
        //如果是新用户，自动完成注册
        if(user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insertUser(user);
        }
        //返回这个用户对象
        return user;
    }

    /**
     * 调用微信接口服务，获取微信用户的openid
     * @param code
     * @return
     */
    private String getOpenid(String code){
        //调用微信接口服务，获得当前微信用户的openid
        Map<String, String> map = new HashMap<>();
        map.put(WXConstant.WX_APPID,weChatProperties.getAppid());
        map.put(WXConstant.WX_SECRET,weChatProperties.getSecret());
        map.put(WXConstant.WX_JS_CODE,code);
        map.put(WXConstant.WX_GRANT_TYPE,WXConstant.WX_AUTHORIZATION_CODE);
        String json = HttpClientUtil.doGet(wxGetUrl, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString(WXConstant.WX_OPENID);
        return openid;
    }
}
